25913520 has 240 divisors, whose sum is σ = 95327232. Its totient is φ = 6531840.

The previous prime is 25913519. The next prime is 25913521. The reversal of 25913520 is 2531952.

It is an interprime number because it is at equal distance from previous prime (25913519) and next prime (25913521).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25913521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 602619 + ... + 602661.

Almost surely, 2^25913520 is an apocalyptic number.

25913520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25913520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47663616).

25913520 is an abundant number, since it is smaller than the sum of its proper divisors (69413712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25913520 is a wasteful number, since it uses less digits than its factorization.

25913520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 25913520 is about 5090.5323886603. The cubic root of 25913520 is about 295.9207847435.

The spelling of 25913520 in words is "twenty-five million, nine hundred thirteen thousand, five hundred twenty".